Used to adjust the is the main factor installation, use and maintenance, maintenance and technical requirements. The installation and use of factors, the first factor, the INA bearing improper installation often caused bearing between parts of the stress state change packing, in operation and abnormal state bearing early failure. Bearing structure design at the same time, have advanced, there will be a long railway bearing life. In general bearing by forging, heat treatment, cutting and grinding and assembly process multi-channel processing. The processing technology of the rationality, the advanced nature, stable, also can affect bearing life.
 
Which influence the quality of the finished product bearing heat treatment and grinding process, often and bearing failure there will be more directly related. On the bearing failure is the main task of the background materials according to the large, data and failure mode analysis, find out the bearing failure caused by corresponding improvement measures, to extend the service time, in order to avoid bearing early failure bearing emergency main factors.

1. Bearing burns
Burns the groove INA bearing, bearing on the back to HuoSe. The cause of the burn is usually insufficient lubrication, lubricating oil quality requirements or metamorphism, and bearing assembly too close, etc.

2. Maintains a chipped its reason is insufficient lubrication, bearing and broken, a circle skewed, etc.

3. Plastic deformation
The tao and roller bearings rolling contact surface appear not uniform pit, explain bearing produce plastic deformation. The reason for this is the great railway bearing the static load or impact load, the working surface of the local stress more than material yield limit, this generally occur in low speed rotating INA bearing.

4. A ring groove serious wear
May is a circle fall into foreign body, lubricating oil shortage or brand lubricant is not right.

For by big impact load bearing the railway, railway bearings, etc., the M hardened when using main failure form for: when the assembly of inner sleeve craze, use process by shock raised edge DiaoKuai, inner circle between fracturing, and because the isothermal quenching bearing impact toughness, good surface compressive stress, no matter when the assembly of inner sleeve craze, or use process of Chinese and foreign DiaoKuai raised edge, in the set of fractured greatly decreased orientation, and can reduce the edge of roller stress concentration. Therefore, after the isothermal quenching than M hardened bearing life expectancy and reliability.

5. Groove surface metal peeling
Bearing and inner and outer groove surface are under the role of periodic pulse loading, which causes the cycles of contact stress. When the stress cycling times up to a certain value, in bearing or inner and outer groove work face only fatigue spalling. If bearing load is too big, can make the fatigue intensified. In addition, INA bearing installation is not straight, shaft bending, also can produce groove spalling phenomena.
Railway bearings rolling the fatigue of the word will reduce shaft of spalling running accuracy, make the organizations that vibration and noise.

6. The bearing housings circle circle crack crack reason may be bearing with close, bearing foreign or inner circle, become loose, bearing tolerance a deformation, installation of poor surface processing bearings.

INA bearing fault has a lot of, all of the design and manufacturing process are the factors and railway bearings failure analysis related is hard to judge. In normal circumstances, be in usually, you can use factor, whether from the internal factors of consideration and analysis.




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